YasiuMath::Ballistics::ProjectileDynamicState< T > Struct Template Reference

Ballistic state. Can move in time with DiscreteStep function. More...

#include <YasiuMathLib.h>

Public Member Functions
ProjectileDynamicState	Predict (T QueryTime, T DeltaTime) const
	Prediction.
ProjectileDynamicState	PredictQuick (T QueryTime) const
	Quick prediction of ballistic state at time. Limitation: Only constant acceleration and no Air Drag. O(1).
virtual void	DiscreteStep (T deltaTime)
	Discrete Step. Function used to modify state in time.
void	AutoStep (T QueryTime, T DeltaTime)
	Step function. O(1) for AirDrag=0.

Public Attributes
Vec3< T >	Position = 0
	Current position.
Vec3< T >	Velocity = 0
	Movement velocity vector.
Vec3< T >	Acceleration = 0
	Acceleration or Deceleration or combined with Gravity Forces.
T	AirFrictionCoeff = 0
	Movement resistance opposite to current velocity vector. Must be in <0, 1> range. More in details...
T	MaxSpeed = 1000
	Maximal speed(length) of velocity vector.

Detailed Description

template<typename T>
struct YasiuMath::Ballistics::ProjectileDynamicState< T >

Ballistic state. Can move in time with DiscreteStep function.

Self-sufficient to predict next state with DiscreteStep and AutoStep

Warning

AirFrictionCoeff must be within <0, 1> range, otherwise model will not be correct or could crash.

Member Function Documentation

AutoStep()

template<typename T>

void YasiuMath::Ballistics::ProjectileDynamicState< T >::AutoStep ( T QueryTime, T DeltaTime )

inline

Step function. O(1) for AirDrag=0.

Iterative prediction for models with AirDrag > 0 Loop count is N = QueryTime / DeltaTime

Parameters

QueryTime	Time to predict into future
DeltaTime	Step size, suggested range <0.1, 1> for stability.

Note

Normally function uses DiscreteStep, but switchest to PredictQuick when AirDrag is 0, effectively being O(1)

Last step has very small DeltaTime depending on math error

DiscreteStep()

template<typename T>

virtual void YasiuMath::Ballistics::ProjectileDynamicState< T >::DiscreteStep ( T deltaTime )

inlinevirtual

Discrete Step. Function used to modify state in time.

Parameters

deltaTime

Time distance to move at single step.

Warning

Using big deltaTime can lead to numeric inaccuracy when dealing with air drag.

Keep deltaTime in small range <0.01, 1>. Suggested value 0.1.

Predict()

template<typename T>

ProjectileDynamicState YasiuMath::Ballistics::ProjectileDynamicState< T >::Predict ( T QueryTime, T DeltaTime ) const

inline

Prediction.

Accuracy depends on DeltaTime. Big delta is faster but with bigger numeric error.

Parameters

QueryTime	Predict position at this time
DeltaTime	Time for single step, suggested range <0.1, 1>

Returns

New State at query time

PredictQuick()

template<typename T>

ProjectileDynamicState YasiuMath::Ballistics::ProjectileDynamicState< T >::PredictQuick ( T QueryTime ) const

inline

Quick prediction of ballistic state at time. Limitation: Only constant acceleration and no Air Drag. O(1).

Parameters

QueryTime

Time To Predict

Returns

Flag tells if projectile has reached full speed or still accelerates

Note

Use Predict for iterative solution when dealing with AirDrag

Member Data Documentation

AirFrictionCoeff

template<typename T>

T YasiuMath::Ballistics::ProjectileDynamicState< T >::AirFrictionCoeff = 0

Movement resistance opposite to current velocity vector. Must be in <0, 1> range. More in details...

$$Drag = Velocity^2 * Coeff$$

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The documentation for this struct was generated from the following file:

• Source/YasiuMath/Public/YasiuMathLib.h